PushViewController لا يعمل

Question

أحاول تعلم Objective-C وأواجه مشكلة في الضغط على وحدة تحكم عرض جديدة عند النقر فوق زر. لديّ وحدة تحكم عرض التبديل مسؤولة عن الضغط على ملف الإعدادات. فيما يلي رمز ViewController:

//
//  ViewController.h
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>
@class ReaderMain;
@class Settings;
@class GoogleClientLogin;

@interface ViewController : UIViewController {

    ReaderMain *readerMain;
    Settings *settings;
    GoogleClientLogin *gClientLogin;
    UIBarButtonItem *mSignInOutButton;
    UIBarButtonItem *mRefresh;

}

@property (nonatomic, retain) ReaderMain *readerMain;
@property (nonatomic, retain) Settings *settings;
@property (nonatomic, retain) GoogleClientLogin *gClientLogin;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *signInOutButton;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *refreshButton;

-(IBAction) switchViews:(id)sender;
@end

ملف ViewController.M

//
//  ViewController.m
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"
#import "ReaderMain.h"
#import "Settings.h"


@implementation ViewController
@synthesize readerMain;
@synthesize settings;
@synthesize signInOutButton = mSignInOutButton;
@synthesize refreshButton =mRefresh;
@synthesize gClientLogin;

/*
 // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    ReaderMain *readerController= [[ReaderMain alloc] initWithNibName:@"ReaderMain" bundle:nil];
    self.readerMain = readerController;
    [self.view insertSubview:readerController.view atIndex:0];
    [readerController release];
    [super viewDidLoad];
}

-(IBAction)switchViews:(id)sender
{
    if(self.settings ==nil)
    {   
        //[mSignInOutButton setTitle:@"SignIn"];
        Settings *googleController = [[Settings alloc]initWithNibName:@"Settings" bundle:nil];
        self.settings = googleController;

        [googleController release];
    }
    [UIView beginAnimations:@"View Flip" context:nil];
    [UIView setAnimationDuration:1.00];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

    if(readerMain.view.superview ==nil)
    {   
        [mSignInOutButton setTitle:@"Settings"];
        [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:NO];
        [readerMain viewWillAppear:YES];
        [settings viewWillDisappear:YES];
        [settings.view removeFromSuperview];
        [self.view insertSubview:readerMain.view atIndex:0];
        [settings viewDidDisappear:YES];
        [readerMain viewDidAppear:YES];
        //[mSignInOutButton setTitle:@"SignOut"];

    }

    else 
    {   
        [mSignInOutButton setTitle:@"Back"];
        [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.view cache:NO];
        [settings viewWillAppear:YES];
        [readerMain viewWillDisappear:YES];

        [readerMain.view removeFromSuperview];
        [self.view insertSubview:settings.view atIndex:0];

        [readerMain viewDidDisappear:YES];

        [settings viewDidAppear:YES];

    }
    [UIView commitAnimations];
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [readerMain release];
    [settings release];
    [mSignInOutButton release];
    [mRefresh release];
    [super dealloc];
}


@end

هذا يعمل كما هو متوقع. بعد تحميل ملف الإعدادات. NIB ، أريد تحميل ViewController آخر للإعدادات المتقدمة. حاولت أن أفعل هذا على النحو التالي:

SETTESS.H FILE

//
//  Settings.h
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "ViewController.h"


@interface Settings : UIViewController {

    IBOutlet UIButton *googleReaderSettings;

}

@property (nonatomic, retain) IBOutlet UIButton *googleReaderSettings;
-(IBAction) goToViewTwo;
@end

ملف الإعدادات

//
//  Settings.m
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//

#import "Settings.h"
#import "GoogleClientLogin.h"
#import "iReaderAppDelegate.h"


@implementation Settings
@synthesize googleReaderSettings;

-(IBAction)goToViewTwo{
    GoogleClientLogin *gClient=[[GoogleClientLogin alloc]initWithNibName:@"GoogleClientLogin" bundle:[NSBundle mainBundle]];
    [self.navigationController pushViewController:gClient animated:YES];
    [gClient release];
}
/*
 // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/

/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
}
*/

/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [googleReaderSettings release];
    [super dealloc];
}


@end

أخيرًا ملف المندوب الخاص بي:

//
//  iReaderAppDelegate.h
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//


#import <UIKit/UIKit.h>
@class ViewController;
@class Settings;

@interface iReaderAppDelegate : NSObject <UIApplicationDelegate> {

    UIWindow *window;
    IBOutlet ViewController *switchViewController;
    IBOutlet ViewController *settings;

}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet ViewController *switchViewController;
@property (nonatomic, retain) IBOutlet ViewController *settings;

@end

وملف المندوب

//
//  iReaderAppDelegate.m
//  iReader
//
//  Created by Vivek Manjunath on 22/08/10.
//  Copyright (c) 2010 __MyCompanyName__. All rights reserved.
//


#import "iReaderAppDelegate.h"
#import "ViewController.h"

@implementation iReaderAppDelegate


@synthesize window;
@synthesize switchViewController, settings;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.
    [window addSubview:switchViewController.view];
    [window addSubview:settings.view];
    [window makeKeyAndVisible];
    return YES;
}

- (void)applicationWillTerminate:(UIApplication *)application {

    // Save data if appropriate.
}

- (void)dealloc {

    [window release];
    [switchViewController release];
    [settings release];
    [super dealloc];
}

@end

ولكن ، عندما أضغط على الزر لتحميل عرض GoogleClientLogin ، لا يفعل شيئًا. لا يوجد إخراج وحدة التحكم أيضًا. هل يمكن لأي شخص مساعدتي في هذه القضية؟ لقد أصلحت تسريبات الذاكرة ويظهر NSLOG أنه يدخل GOTOVIEWTWO.

Answer 1

أثناء التنقل ، أرى شيئين في الكود الخاص بك.

1) هل قمت بتوصيل Ibacte بالزر ، والتي يجب أن تؤدي إلى التغيير؟ (في InterfaceBuilder)

2) في gotoviewtwo methode ، يمكنك تخصيص gclient لكنك لم تصدره أبدًا. لذلك أنت تنتج تسرب الذاكرة.

اقتراحي: ضع أ NSLog(@'Was in GoToViewTwo-Method') في GotoViewtwo-Method لاختبار ما إذا كان يتم تنفيذه أثناء استخدام البرنامج. حتى تتمكن من معرفة ما إذا كانت ViewController هي المشكلة أو إظهارها هي المشكلة. ؛-)

اسف للغتى الانجليزيه. أعلم أن هذا ليس الأفضل ، لكنني حاولت الكتابة قدر الإمكان. ؛-)

Answer 2

هل قمت بإعداد NavigationController في IB؟

وإلا لا يمكنني رؤية مكان تستخدمه في الكود الخاص بك.